added pseudo code usage example

CIP-0048/CIP-0048.md

@@ -68,7 +68,7 @@ Specifically, this proposal aims to solve for the following:
 4. Given a nft find there references
 5. Concatenate the data for all given references
 
-In example 
+### In example 
 ```
 nft 0 has the payload "p":{"0":""Hello","1":"World" } and the references "r":[0,1]
 nft 0 == "HELLOWORLD"
@@ -82,6 +82,28 @@ nft 2 has no payload and the references [1,0] (note the order)
 nft 2 == "WORLDHELLO"
  ```
 
+### pseudo code
+for all txs in policy
+```
+if metadatum tag is '721'
+ if 'payload' or 'p' in json['721][<POLICY_ID>]
+ for payloads in ['721][<POLICY_ID>]['p']
+ for refrenceName, data in payload
+ add data with referencename to datastructure 
+```
+
+
+for a given nft
+```
+refs = json['721'][<POLICY_ID>][<NFT_NAME>]['references']['src']
+dataType = json['721'][<POLICY_ID>][<NFT_NAME>]['references']['data']
+
+for ref in refs
+ nft data += data from datastrucure indexed with ref
+```
+
+payload 
+
 # backwards compatibility
 Used the version tag described